Lamborghini's Gallardo Superleggera is 220 pounds lighter — and 10 horsepowers hotter than the Gallardo SE. That decreases its time in the zero-to-62 mph run from four seconds to 3.8 seconds. Not a particularly mindbending difference in the scheme of supercar performance, but Lambo totally gets the concept of incremental bragging rights among well-heeled buyers. By whatever five-figure premium the Superleggera demands, mainly from carbon-fiber costs, Lamborghini will probably raise its gross margins by at least a point or two. That'll make the Audi bosses crack one hell of a reserved half-smile.